Hammond ward



\ vation ofthesanie andF l HAMMOND wann, or cHAnLnroN, MASSACHUSETTS. ni

d MAoHINnFoR DRESSING STONE.

- specification of Lettersfratnt Nofseepdatee Apriiio, i844( i T0 all tmay concern:` i i Beit known that l, HAMMOND WARD, of Charleton, `infthe` county 0f Worcester and iState of lVfassachusettmhave inventedcerf' tain new and `useful" Improvements in Ma-` chinery for Dressing orPickinggStone, and `thatfathe .following descriptiongand accompanyingdrawings thereof, taken inconnec-` tion, `constitute aafull and exactspecification ofthe same. l n w Y l Figure l of the` `drawings above i`mentioned represents a topfview ofmy improved `stone dressinginachine.i Fig.` 2 isa side eleig. Bis anend view,`

thereoff 1 y i i i. `Theoperative artsofft-helmechanism are arranged andi supported upon fa framework of timber or;otheriisuitable material, the

same consisting Cof four `posts A, A, lA, A

(Figs. 1, "2, united togetherat or `near their i lower `endsbyhorizontal longitudinal andftransversebarsyB, C, and atftheirupperparts by inclinedbars D, D`,andhorizontal and transverse ones C, C, asseeni in the drawings.` a d n n .l

The posts f-atkone end ofthe frame, are constructed; Somewhat longerthan those at the opposite i end.;` Long` horizon-tal rails; or timbersE, E, are secured to the inner sides of the postsandlower barscD, D,thesaid rails being parallel toeaoh other and sup-i porting `on their`upper edges a movable can riage F, upon which thel stone `Gr` to bedressed is placed and secured in .i any conf` venient manner. x i i Thecarriage is moved longitudinallyby means of alongraclrof teeth aapplied" to its' underside f and acting in connection with a coggedpinion l2 fixed upon a horizontal transverse shaft H, Fig. 2; the shaftH be-` ing turned by a pulley I upon its opposite end around which(pulley) a bandK operates, the saidA band` `proceeding from a groovedpulley L attached to the side of a larger pulley M. Motion is impartedto the latter pulley by` means of a small pulley N fixed on one end ofthe cam shaftgand an endless band 0 extending therefrom to. a largerpulley P having a smaller pulley Q attached to its side from which(smaller pulley) another band R extends to and around tlie large pulleyM. The cam shaft S is driven o-r caused 1to turn around by means of apulley on its other end and a crossed band U proceeding therefrom to andabout another pulley V situated uponfone end of the driving or othercamshaft-W, sustained or revolving inl bearings formed` in the tops ofstandards `or `posts X, X, which extend upward froman inclined or fmovable Aframe `The `oppositecam'shaft issimilarly sustained on theframe HY, i Theframe Y isarranged within i sented in Fig. l, by dotted`lines, at a, 65,) fixedeither at one end or at some other suitablepartthereof` and so arranged as to permit the `other end ofthe frame Y,or that upon which the cam Vshaft S is situated to` be moved "up anddown in a vertical directionand confined at anydesirable inclina,`

frame Y and in `direction perpendicular or i i thereabout to the same asseen in thegdraw,` `ings` The frame Y serves also to sustaintwotlharnesses"7 cl, el, which extend across a it parallel to each otherand at the distance apart as seen in Fig. l,each ofthe said liarnessesconstituting the fulcra or bearings of theupper part `of the mainframework and `is sustainedthereon by journals (repre-` a Series of triphammers e, e, e, `etc., which A are put in operation or caused torisefby means of cainsor wipers f, f, j", ac., extend ingfrQHl the camshafts before mentioned,

end to the frame a d n i i :The frontor first two rows of cutters b, b,

arefor the` purpose `of picking or removing the rough portions ofthestone, and act upon the stone prior to the other cutters whose object is-to dress or smooth the` surface.` Thefront `cutters are formed withpointed` lor inverted fpyramidal ends while the rear cutters c, c, arewedge or chisel shaped.

Each cutter is lifted `from the stone, after it has been driven downupon the same by means of a spring tapplied to its stock and to Atheframe Y.

In order that the front cutters may operate upon the stone in suchmanner ,as to reduce its surface in the requisite degree for `the actionof the dressing or finishing cutters, they should have not `only amotion up and down but a lateral or transverse move-` ment imparted tothem. Y The peculiar object of this transverse motion is to prevent thesrs and to lfall upon tlieheads of the cutter stoclsby springs g,g,(seeFig. `2))"each of `which `(springs), is attached at one of itsends to `one of` thehammers and at itsf other `ment of the front cuttersthe rough parts of the stone are easily removed and a reduction effectedsufficient for the action of the dressing or finishing tools. Suchlateral motion of the front cutters, is produced by a transverse slidingbar z', (see Fig. 3) which is arranged and supported underneath theframe Y and bet-Ween the two front ranges of cutter stocks each cutterstock passing` through a notch formed in the side of the bar so thatWhenever the bar is moved to and fro in the direction of its length itcarries or moves the cutters with its laterally over the surface of thestone. The machinery which moves the slide bar consists of a cord orchain 7c attached to one end and proceeding therefrom through the frameY and to the end Z ofa lever l m, Which end is elevated by means of acam or eccentric a', arranged upon the cam shaft W. rlhe lever Z m hasits fulcrum in the harness frame contiguous to the cam shaft lV. lVhenthe end Z of the lever is raised, the slide bar z' is drawn in onedirection and when depressed it is drawn in the opposite direction bythe counteraction of a spring G applied to the opposite end of the slidebar and to the frame Y.

ln order to form a sharp and even corner upon the edge of the stone Icombine with the pickers and dressers one or more blunt tools P Whoselower edge is formed at right angles or thereabout to its sides. Such atool has its stock which is elevated and depressed in a similar mannerto those of the pickers and finishers. llhen it falls upon the surfaceit cuts or breaks oft the edge, for a slight depth, square to thesurface so that When the stone is turned over upon the carriage so as tobring its side under the operation of the cutters, they Will not injurethe edge or corner but leave it sharp and true as desired. Such cuttersl find to be a great addition to stone dressing machines, and to obviatethe difficulties heretofore eX- perienced in the operation of thecutters upon the corners of the stone.

The shanks or stocks of the cutters should be suitably guided andsupported so as to move up and down Within the frame Y and be soarranged therein that they can be easily removed or their numberincreased or diminished at pleasure in order to adapt the mechanism todress stones of different Widths. The harnesses which support thehammers should be so constructed as to render it easy to increase ordiminish the number of hammers according` as the samemay be requisite;all of which Will be easily understood by mechanicians and those Who'use stone dressing` machines.

The peculiar object of rendering the frame Y lmovable as beforementioned and described, is to adjust or vary the inclination of thecutters to the surface of the stone some kinds of stone requiring thecutters to act upon it at a greater inclination than others and as thestone is to'be supported upon the moving carriage, by a series ofblocksby which it is elevated to the requi-V site height or may beraised to' such height by any other desirable and proper means, ittogether With thecutter frame Y may be arranged so as to bring thelcutters tothe proper degree of inclination to the stone.

Having thus explained my improvements I shall claiml. Themanner' bywhich I am enabled to vary or alter the inclination of the cuttingchisels With respect to the plane or face of the stone to be dressed,viz., by sustaining or arranging the stocks or spring holders of thechisels in a movable frame Y which shall turn on centers or bearingsdisposed at one end thereof or any other suitable part of the machine.

2. Also the combination with the series of cutters for dressing the topsurface, of the square or blunt edge cutter or cutters P, P, for thepurpose of forming the square corner 0r edge of stone as hereinbeforeset forth.

In testimony that the above is a correct specification I have heretosubscribed my name this thirteenth day of November of the year A. D.1843.

HAMMOND TWARD.

Wi t-nesses HENRY CLARKE, PERMELIA D. CLARKE.

